Port State Control

PrimeShip-PSC Intelligence

PrimeShip-PSC Intelligence is a system for the owners and operators of NK-classed vessels or vessels whose ISM/ISPS/MLC are registered with NK in order to support an improvement of PSC performance and ship management system.
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ClassNK PSC Bulletin

Information on particularly notable or increasing findings pointed out during PSC inspections of NK classed ships

ClassNK PSC Bulletin No. 24 (English)  Issuance of Marine Notice 2024/03 on Inspection Procedures and Detention Criteria for Oil Filtering Equipment at Australian Ports
ClassNK PSC Bulletin No. 23 (English)  Proper operation and maintenance of 15 ppm Bilge Separator and Oil Content Meter

ClassNK PSC Bulletin - Back Number

ClassNK PSC Bulletin No. 21 (English)  Detainable deficiencies pointed out by AMSA in 2020
ClassNK PSC Bulletin No. 20 (English)  Validity date of spare charges of powder fire extinguishers
ClassNK PSC Bulletin No. 19 (English)  Fitting of small-diameter self-closing control cock on termination end of sounding pipe for fuel oil tanks in machinery spaces
ClassNK PSC Bulletin No. 18 (English)  Matters concerning the BWM Convention often pointed out by PSC
ClassNK PSC Bulletin No. 17 (English)  Defects of fire doors
ClassNK PSC Bulletin No. 16 (English)  Fire main/CO2 lines on deck
ClassNK PSC Bulletin No. 15 (English)  Quick closing valves for fuel oil tanks
ClassNK PSC Bulletin No. 14 (English)  Operation test for automatic starting arrangement of emergency generator (Blackout simulation test)
ClassNK PSC Bulletin No. 13 (English)  Closing Arrangements of Cargo Hatch Covers
ClassNK PSC Bulletin No. 12 (English)  Closing Device of Air Pipe Defective
ClassNK PSC Bulletin No. 11 (English)  Cable penetration of ECDIS
ClassNK PSC Bulletin No. 10 (English)  Immersion Suits
ClassNK PSC Bulletin No. 9 (English)  Davit Launched Liferafts
ClassNK PSC Bulletin No. 8 (English)  ECDIS (Electronic chart display and information systems)
ClassNK PSC Bulletin No. 7 (English)  Proper Gear for Testing Fire Detectors Required by USCG
ClassNK PSC Bulletin No. 6 (English)  Fixed Gas Fire-Extinguishing Systems
ClassNK PSC Bulletin No. 5 (English)  Integrity of emergency fire pump suction and discharge piping that penetrates the machinery space
ClassNK PSC Bulletin No. 4 (English)  Reporting to the Port State about a discovered defect before entering the port
ClassNK PSC Bulletin No. 3 (English)  Record of Equipment (Form E) for Cargo Ship Safety Equipment Certificate (SE Cert.)
ClassNK PSC Bulletin No. 2 (English)  Fixed Gas Fire-Extinguishing Systems
ClassNK PSC Bulletin No. 1 (English)  Fixed Local Application Fire-Fighting Systemse

PSC Annual Report

Download ARRIVAL CHECKLIST for PSC mobile app

ARRIVAL CHECKLIST for PSC mobile app is the preparatory onboard equipment checklist mobile app to help minimize the risk of PSC detentions and deficiencies.

Key features:

  • The app categorizes items that are frequently pointed out as deficiency at PSC inspections by location.
  • Inspection results can be input into the system along with notes and photos for each corresponding checklist item.
  • Users have the option of creating a PDF version of the completed results, which can be forwarded shore side.
  • Users can also confirm the statistical data and the tendency of detainable deficiencies in across a number of major PSC areas.
  • Updates are available for the checklist and statistics to ensure the app has the latest PSC data.

ARRIVAL CHECKLIST for PSC mobile app is available for download from the following website.

QR code for iPhone

Go to the App Store

For iOS users

Go to the App Store

QR code for Android

Go to the Google Play

For AndroidTM users

Go to Google PlayTM

- The Apple logo is a trademark of Apple Inc., registered in the U.S. and other countries. App Store is a service mark of Apple Inc. iOS is a trademark or registered trademark of Cisco in the U.S. and other countries and is used under license.
- Android, Google Play, and the Google Play logo are trademarks of Google Inc.

Quick Start User’s Guide to ARRIVAL CHECKLIST for PSC (1,582kb)

Shipboard maintenance and operation

A shipowner always needs to ensure that the ship is properly maintained and operated so that it remains in conformance with all applicable international standards and requirements.
Such careful maintenance and operation of the ship will go a long way to avoiding any unnecessary problems during a PSC inspection.
Most lapses and deficiencies onboard can be prevented by doing various operational checks, maintenance and repairs, etc. of machinery and equipment regularly. This includes maintaining shipboard records properly, confirming the validity of all certificates and documents as well as verifying the survey dates of all relevant class and statutory surveys.
In addition, always taking care to keep things onboard ship in good order and striving to improve the shipboard environment can go a long way to not only enhancing safety in daily operations, but is also an effective means of coping with PSC inspections. (Indeed, as the old adage says, “an ounce of prevention is worth a pound of cure.” ) The Society has prepared “Good Maintenance On Board Ships” and “ARRIVAL CHECKLIST for PSC” as a ship management checklist and tool for use during voyages to help Masters and operators achieve these goals more easily.

Good Maintenance On Board Ships (5,108kb)

What is Port State Control?

Port State control, or PSC, is the exercise of the right of a port State, when granting permission to a foreign flagged ship to enter a port of the port State, to inspect the vessel to ensure that it meets international safety, pollution and other requirements.
Various international standards and conventions, such as the SOLAS Convention, MARPOL Convention, and the International Load Line Convention, have been enacted in order to promote the safety of life and property at sea and to protect the marine environment with respect to oceangoing ships. Although the flag State and owner of a ship have fundamental responsibility for ensuring that these requirements are implemented, supervision by the flag State is many times insufficient. There is also often a lack of adequate competence and experience on the part of ship crews and others that can all too often have an adverse impact on safety, as well.
PSC has been established as a means of proactively complementing the role of flag States with the primary aims of improving ship safety and eliminating substandard ships. This consists of conducting inspections of various aspects of a ship once it has arrived in port, including the safety of life and property onboard the ship, prevention of pollution by the ship, and the living and working conditions onboard the ship.

PSC inspection process

A PSC inspection typically consists of a check of the documents and certificates onboard ship combined with a condition survey of the vessel. However, a more detailed survey is carried out if there are “clear grounds” for such, as when deficiencies are found in the ship's compliance with mandatory international requirements, or there is some question as to the safety condition of the vessel. If serious deficiencies are found affecting safety as a result of the inspection, the ship is detained and the captain is instructed to rectify the deficiencies before departure. In the event that the deficiencies are not rectified or no suitable plan is presented for rectifying them, the ship will be prohibited from leaving the port.


The importance of PSC is now recognized by most countries around the world. Regional cooperation among port States has led to the concluding of Memoranda of Understanding, or MOUs, that seek to promote and realize more effective PSC for a given region. The first such agreement was signed in Paris in 1982. Since then, MOUs concerning the implementation of PSC regimes have been concluded in a total of nine regions in the world, as summarized in the following table (only member states are listed).

Name of Agreement
Member States
Paris MoU
(European and North Atlantic region)
Belgium, Bulgaria, Canada, Croatia, Cyprus, Denmark, Estonia, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Latvia, Lithuania, Malta, the Netherlands, Norway, Poland, Portugal, Romania, the Russian Federation, Slovenia, Spain, Sweden, the United Kingdom
Tokyo MOU
(Asia-Pacific region)
Australia, Canada, Chile, China, Fiji, Hong Kong, Indonesia, Japan, Republic of Korea, Malaysia, the Marshall Islands, New Zealand, Panama, Papua New Guinea, Peru, the Philippines, the Russian Federation, Singapore, Thailand, Vanuatu, Viet Nam
Latin American Agreement (Latin-American region) Argentina, Bolivia, Brazil, Chile, Colombia, Cuba, Ecuador, Guatemala, Honduras, Mexico, Panama, Peru, Republic of Dominica, Uruguay, Venezuela
Caribbean MOU
(Caribbean region)
Antigua and Barbuda, Aruba, Bahamas, Barbados, Belize, Cayman Islands, Cuba, Curacao, France, Grenada, Guyana, Jamaica, the Netherlands, St. Kitts and Nevis, St. Vincent and the Grenadines, Suriname, Trinidad and Tobago
Mediterranean MoU (Mediterranean region) Algeria, Cyprus, Egypt, Israel, Jordan, Lebanon, Malta, Morocco, Tunisia, Türkiye
Indian Ocean MOU (Indian Ocean region) Australia, Bangladesh, Comoros, Eritrea, France (La Reunion), India, Kenya, Maldives, Mauritius, Mozambique, South Africa, Sri Lanka, Sudan, Sultanate of Oman, Tanzania, Yemen
Black Sea MOU
(Black Sea region)
Bulgaria, Georgia, Romania, the Russian Federation, Türkiye, Ukraine
Abuja MoU
(West and Central Africa region)
Angola, Benin, Cape Verde, Republic of Congo, Cote D’Ivoire, Gabon, The Gambia, Ghana, Republic of Guinea, Guinea Bissau, Nigeria, Sao Tome and Principe, Senegal, Sierra Leone, South Africa, Togo
Riyadh MoU
(Arab States of the Gulf)
Kingdom of Bahrain, Kingdom of Saudi Arabia, State of Kuwait, State of Qatar, State of United Arab Emirates, Sultanate of Oman

Concentrated Inspection Campaigns (CIC)

Regional PSC MOU members will agree to carry out concentrated inspection campaigns from time to time for periods of usually three or four months. These campaigns are often announced beforehand through press releases and other means and generally focus on certain aspects of ship safety. Past inspection campaigns have focused on such areas as follows:

  • MLC, 2006
  • Structural Safety and Load Lines
  • Cargo Securing Arrangements
  • Tanker Damage Stability
  • Crew Familiarization for Enclosed Space Entry
  • Harmful Substances Carried in Packaged Form
  • STCW Hours of Rest
  • Lifeboat Launching Arrangements
  • Propulsion and Auxiliary Machinery
  • Safety of Navigation
  • Fire Safety Systems
  • ISM Code

Activities of the Society

Whenever the Society receives a PSC inspection report from a port State Administration, an investigation is carried out at the Head Office of the Society to determine the cause of the deficiency. The shipowner and flag State are then informed of the results of the investigation, and the results are also input into a dedicated database on PSC maintained by the Society. Effective use is also made of this information through the publication of the Annual Report on Port State Control, and other materials by the Society.
In addition, “Technical Information” releases are issued to provide updates and various notices on a range of topics including information on PSC, whenever necessary.